Ontario Geological Survey
Permanent Link to this Record:
MDI42C03SW00021
| Record Name(s) | Rook Lake Shear Anomaly - 1987 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Jan-08 |
| Date Last Modified | 2022-Sep-12 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Mishibishu Lake Area
Latitude: 48° 4' 11.41" Longitude: -85° 28' 39.21"
UTM Zone: 16 Easting: 613412.65 Northing: 5325183.45 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C03SW
Point Location Description: Sample site on Muscocho grid 54+00W, 24+00N
Location Method: Based on Assessment
Access Description: Drive west along highway 17 from the junction of highway 17 and 101 for approximately 50 km to the Paint Lake Road (a gravel road heading south from highway 17). Drive south along the gravel road for approximately 60 km and then traverse overland to the site.
1987-88: Flanagan McAdam and Company - airborne geophysics, prospecting, mapping, ground geophysics, 5 ddh (2195 ft).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP Mishibishu Lake.11 | 42C03SW0069 | 42C03SW0069 |
| WPMISHI LAKE.34 | ||
| WP Mishibishu Lake.31 | 42C03SW0057 | 42C03SW0057 |
| WP Mishibishu Lake.18 | 42C03SW0063 | 42C03SW0063 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Tectonic Assemblage: Catfish
Geological Age: Neoarchean Geochronological Age: 2.7 GA Geochron. Age Ref.: GOO VOL 1
Dec 07, 2005 (A Wilson) - This area is interpreted to be the westward extension of the Rook Lake Deformation Zone. The strike length of the RLDZ is 8 km and the maximum width is 1 km. The RLDZ is centred within a clastic metasedimentary rock sequence which exhibits sheared contacts with felsic intrusive rocks to the north and mafic metavolcanics to the south. The style of deformation and alteration observed in the RLDZ is similar to, yet not as intensely developed as the MDZ. The penetrative foliation strikes 285, dips moderately steeply to the north. Variable trending, moderately to steeply plunging stretchin lineations are commonly obscured or overprinted by crenulation lineattions. The RLDZ possesses structural characteristics similar to the other deformation zones in the belt. Felsic intrusive dikes/sills are common and concentrated within the central and northern parts of the zone, ranging in thickness from centimetres to several hundred metres.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Schist-Unsubdivided | 2 | Chlorite | Near |
Dec 07, 2005 (A Wilson) - Diamond drlling by Muscocho intersected predominately mafic metavolcanics which are highly deformed at the top of hte hole and then yield to mafic volcanic breccia downhole. The breccia then changes to a less deformed sequence of more intermediate metavolcanic rocks.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Chalcopyrite | Economic | Gangue | ||||
| 3 | Graphite | Economic | Gangue |
Dec 07, 2005 (A Wilson) - A grab sample from a quartz vein returned an assay of 750 ppb Au.
Map - Precambrian geology, Mishibishu Lake area, Macassa Creek sheet
Publication Number: P3151 Scale: 1:15,840 Date: 1992
Author: Reid R.G., Bowen R.P., Heather K.B., Logothetis J., Reilly B.A.
Publisher Name: Ontario Geological Survey
Location:
Folio - Mishibishu Lake area, Sault Ste. Marie Mining Division, NTS No. 42C/03SW
Publication Number: GDIF597 Date: 1997
Author: Wawa RGO
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology, Mishibishu Lake area, northeastern section, districts of Thunder Bay and Algoma
Publication Number: P2970 Scale: 1:15,840 Date: 1986
Author: Bowen R.P., Logothetis J., Heather K.B.
Publisher Name: Ontario Geological Survey
Location:
Map - University River, Algoma and Thunder Bay districts
Publication Number: M2333 Scale: 1:63,360 Date: 1976
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 292 Date: 1991
Author: Frey E.D., Stewart R.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Operation Pukaskwa, University River sheet, districts of Thunder Bay and Algoma
Publication Number: P0507 Scale: 1:63,360 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Operation Pukaskwa, districts of Algoma and Thunder Bay
Publication Number: P0541 Scale: 1:126,720 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Mishibishu Lake area, District of Thunder Bay, Ontario
Publication Number: ARM49J Scale: 1:63,360 Date: 1997
Author: Evans E.L.
Publisher Name: Ontario Dept. of Mines
Location:
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